A certain type of superalloy disk component of aero-engine is welded by the turbine disk and the outer integral blade ring, and when the conventional single-channel ultrasonic method is used to detect welding surface defects, there are problems such as low detection resolution and poor signal-to-noi...

The software safety is important factor in our daily life, model-driven software development gains more and more attention. For the existing integration barriers of cross-domain models, we popose a method based on meta-modeling techniques, which is applied for extracting multi-perspective model info...

To effectively alleviate the cascading failure of air traffic, the traditional load-capacity model is improved, and the critical value of capacity adjusting parameter is discovered. An air traffic Cyber Physical System (CPS) model is built, and its nodes are defined to be in three states: normal, co...

In engineering structures, the corrosion fatigue failure is a common phenomenon. The fatigue crack often occurs around the corrosion pit, which seriously affects the fatigue characteristics of materials. In this paper, based on the continuous damage mechanics, a method is proposed for the fatigue li...

Unmanned swarm system is composed of a multi-agent system, which can meet task requirements through autonomous and cooperative behavior. The instability of agent training is increased because agents adopt behavior and change states autonomously. In this paper, the prior constraints and the isomorphi...

Aimed at the characteristics of complex structure, various elements, and strong coupling of aviation equipment system, based on the analysis of its support process, the multi-Agent modeling technology is used to carry out the supportability modeling of the aviation equipment system, and analysis and...

At present, in the related researches of airspace spatial finite element, the construction of a grid identification system for airspace space is an important foundation for applying information technology to airspace management and promoting airspace digitization. Based on the US military's global r...

When the aerocraft is maneuvering in a large envelope, its rudder surface and engine are easily saturated. This phenomenon will not only affect the stability of the closed-loop system, but also greatly shorten the service life of the engine and other key components. To solve this problem, a nonlinea...

For the coaxial rigid model rotor in hovering state, the experimental and numerical simulation research on blade surface pressure measurement were carried out. The micro pressure sensor was used to measure the blade surface pressure, which not only obtains the experimental data of blade surface pres...

The effects of monochromatic blue light and three groups of blue-enriched light on the change of alert level of flight cognitive tasks were tested from the subjective and objective performance of flight cognitive tasks. Objective experimental evaluation, including the measurement of flight main and ...

The development of deterministic communication promotes the introduction of time-triggered concepts. Time-Triggered Ethernet (TTE) network supports real-time applications of mixed safety by providing three traffic classes, including Time-Triggered (TT) traffic, which has complete time certainty, Rat...

2, 2'-bis (ethylferrocenyl) propane (catocene) is a kind of high-efficiency burning rate liquid catalyst with excellent comprehensive performance. It is a mixture with four isomers of the different substituting positions of ethyl groups and other different substitutions of diferrocenyl propane compo...

The aerodynamic characteristics of NACA 4412 airfoil moving over wavy water at small clearance is studied by solving Navier-Stokes equations. The accuracy of the numerical method is verified. The aerodynamic coefficients of airfoil moving over wavy water surface and wavy ground are calculated and co...

In order to solve the problems of inaccuracy in heat map generation and insufficient detection accuracy of anchor-free object detection method CenterNet (Objects as Points), a high-resolution representation network CenterNet-DHRNet based on feature iterative aggregation is proposed. First, for the p...

Remaining Useful Life (RUL) prediction is a core problem of equipment prognostics and health management. Accurate RUL prediction can make effective maintenance management before the failure occurs to reduce the probability of equipment failure. A heuristic RUL prediction method is proposed to overco...

To study the unsteady effects of capsule wake on parachute aerodynamic performance, the Realizable k-ε turbulence model and PISO algorithm are used to calculate the unsteady flow around the capsule-parachute system, and an accurate flow field vortex structure is obtained. The research on the variati...

The flattened aerodynamic shape is the preferred layout for hypersonic vehicles to obtain high lift drag ratio, but this shape seriously restricts the collection space of the landing gear, and the conventional mechanism is difficult to meet the requirements. Engineers can only use the three-dimensio...

When jamming effectiveness evaluation is transformed to a multi-attribute decision-making problem, traditional Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) is too objective to fully reflect the will of the evaluator, and the method only considers the inter-index Euclide...

In the improvement process of swarm intelligence algorithms, elite individuals are often used to accelerate the convergence, but excessive dependence on them will lead to the decline of population diversity and global convergence. In this regard, a chicken swarm optimization algorithm based on impro...

Relative small crack growth rate formula of structural details is the key to durability analysis using probabilistic fracture mechanics method. In order to determine the applicable range and parameters of the formula, it is necessary to carry out group fatigue tests under multiple stress levels, whi...

In view of the problem that the dynamic model of some morphing vehicles is complex, which is caused by the complicated variant description and the rigid-flexible coupling, a general applicable dynamic equation of morphing vehicle is derived. The vehicle is regarded as a whole composed of mass points...

In order to solve the problem of friction moment increase caused by rolling body accumulation during the rotating process of the space launch pad turntable bearing, this paper studied the influence of the change of clearance between the rolling bodies on the rolling. Based on the finite element anal...

In order to improve the performance of Low Density Parity Check (LDPC) code sparse parity-check matrix reconstruction algorithm under high error rate, this paper proposes a sparse parity-check matrix reconstruction algorithm based on the idea of iterative decoding. First, the dual space algorithm is...

To realize the communication security and efficient identity authentication between users and servers, how to design effective identity authentication protocols has gradually become an important research hotspot, more and more identity authentication protocols are proposed. First, this paper analyse...

In order to study the possibility of flight control by circulation control technology, the control moment characteristics of steady jet circulation control airfoil in steady flow field are studied. The aerodynamic coefficient variation rules of virtual rudder and traditional rudder produced by singl...

The double-layer latex balloon overcomes the shortcomings of the single-layer latex balloon and can float at high altitude with long time to achieve continuous meteorological observation. However, its high-altitude floating mechanism influenced by multiple factors is much more complicated. In partic...